Heaters for yarn



Sept. 6, 1955 w. w. EGEE ET AL HEATERS FOR YARN Filed May 51., 1952 FIG.3

INVENTORS. W. W. EGEE J. W. BENNETT ATTORNEY.

United States Patent HEATERS FOR YARN Walter Warren Egee, Yeadon, andJohn W. Bennett,

Philadelphia, Pa., assignors to Fletcher Works Incorporated,Philadelphia, Pa., a corporation of Pennsyl- Vania Application May 31,1952, Serial No. 290,861

3 Claims. (Cl. 219-19) This invention relates to heaters and moreparticularly to heaters for heat treatment of yarns.

In the treatment of yarns of various types for drying, setting, or otherpurposes, the application of heat may be required, usually at apredetermined temperature, or within a predetermined temperature range.The required temperature is determined by the treatment to be accordedbut is limited so that the yarn is not injured by excessive heating.

Various provisions have heretofore been made for applying heat to yarn.In some operations, the yarn has been moved over the exterior surface ofa heated pipe or tube in contact therewith. While satisfactory resultsmay be obtained in so far as the heating of the yarn is concerned, theinstallation of such piping or tubing is troublesome and there islikelihood of soiling of the yarn, as well as the introduction ofundesired increase of tension in the yarn.

It has also been proposed to pass the yarn axially through tubes inwhich steam is supplied. While the desired heat may thus be applied, thethreading of yarns through such tubes, upon starting up, or upon theoccurrence of a break in the yarn is troublesome.

In our application for Letters Patent for Treatment of Yarns, filed June19, 1952, Serial No. 294,332, the treatment of yarn with heat is shownfor which the heater of the present application is particularlysuitable.

It is the principal object of the present invention to provide a heaterwhich is simple and compact in construction, which provides the desireddegree of heat, which may be readily mounted at the desired location foruse and which is particularly adapted for heating yarns for variouspurposes.

It is a further object of the present invention to provide a heater foryarn having spaced heating plates between which a yarn may be readilyinserted and between which a yarn may be readily drawn or moved asdesired.

It is a further object of the present invention to provide a heaterhaving a removable heating cartridge capable of easy removal forreplacement if desired.

Other objects and advantageous features of the invention will beapparent from the specification and claims.

The nature and characteristic features of the invention will be morereadily understood from the following description, taken in connectionwith the accompanying drawings forming part hereof, in which:

Figure 1 is a side elevational view of a heater in accordance with theinvention;

Fig. 2 is a front elevational view thereof; and

Fig. 3 is a top plan View thereof.

It should, of course, be understood that the description and drawingsherein are illustrative merely and that various modifications andchanges may be made in the structure disclosed without departing fromthe spirit of the invention.

Like numerals refer to like parts throughout the several views.

Referring now more particularly to the drawings, the

Patented Sept. 6, 1955 ice heater in accordance with the presentinvention preferably includes a body portion 10, formed from a piece ofsheet metal, such as stainless steel, to provide an outer flat wall 11,and a pair of spaced parallel heating walls 12 and 13 parallel to thewall 11. The heating wall 12 is connected to the wall 11 by an endsection 14 and the walls 12 and 13 are connected at their inner ends byan inner curved heating wall 15. The wall 13 is preferably connected toa flat outer wall 16 by an end section 17. The wall 16 has a curved orcylindrical portion 18 which is connected to an end section 19 disposedparallel to the wall 11.

It will be noted that a space is enclosed within the wall 11, theheating wall 15 and the wall portion 18 for insertion and retention of aresistance heating cartridge 20. The cartridge 20 may be provided withpower leads 21 for connection to any suitable controlled source ofelectric power (not shown) for electric energy input.

Between the walls 11 and 12 and between the walls 13 and 17 spacerplates 22 are preferably provided, to increase the heat holding orcapacity effect of the walls 12 and 13.

It will be noted that a channel 23 is provided between the wall 12 andthe wall 13 and in front of the wall 15 within which the yarn is adaptedto be moved, along the channel 23 but out of contact with the walls 12,13 and 15, for the application of heat thereto for any desired purpose,such as drying, setting or the like. While any desired width of channel23 may be employed, in one specific embodiment of the invention thechannel 23 is of a width of the order of three-sixteenths of an inch, adepth of the order of seven-sixteenths of an inch and a length of theorder of one and five-eighths inches.

The walls 11 and 19 preferably have holes 24 extending therethrough formounting the heater by means of bolts (not shown) in any desiredlocation, with the channel 23 disposed vertically, horizontally orinclined, as desired.

We claim:

1. A heater for yarn having a body portion formed of sheet metal toprovide an outer wall portion, a first inner wall connected to saidouter wall portion, a second inner wall spaced from said first innerwall, a connecting wall between said inner walls, a second outer wallportion having a part extending towards said first outer wall portion,said inner walls and said connecting wall bounding an open sided andopen ended heating channel for passage of the yarn therethrough, saidfirst outer wall portion, said connecting wall and said part of saidsecond outer wall portion having a space therebetween, an electricheating unit in said space for heating said inner walls, and heatconducting spacers between said first outer wall portion and said firstinner wall and between said second outer wall portion and said secondinner wall for engagement with said heating unit.

2. A heater for yarn having a body portion formed of a single piece ofsheet metal to provide an outer wall portion, a first inner wallconnected to said outer wall portion, a second inner wall parallel toand spaced from said first inner wall, a connecting wall between theinner ends of said inner walls, a second outer wall portion connected tosaid second inner wall and having a part extending towards said firstouter wall portion, said inner walls and said connecting wall being infixed relation and bounding an open sided and open ended heating channelfor passage of the yarn therethrough, said first outer wall portion,said connecting wall and said part of said second outer wall portionhaving a space therebetween, and an electric heating unit in said spacefor heating said connecting wall and said inner walls.

3. A heater for yarn having a body portion formed of sheet metal toprovide an outer wall, a first inner wall connected to said outer wall,a second inner wall parallel to and spaced from said first inner wall, aconnecting wall between the inner ends of said inner walls, a secondWall connected to said second inner Wall and having a portion extendingtowards said first outer wall, said inner walls and said connecting wallbeing in fixed relation and bounding an open sided and open endedheating channel for passage of the yarn therethrough, said first outerwall, said connecting wall and said portion of said second outer wallhaving a space therebetween, and an electric heating unit in said spacefor heating said connecting wall and said inner walls, and

heat conducting spacers between said first outer wall portion and saidfirst inner wall and between said second outer wall portion and saidsecond inner wall for engagement with said heating unit.

References Cited in the file of this patent UNITED STATES PATENTS

